Why is my ethernet connection connecting and disconnecting repeatedly?
7,659
correct me if im wrong but it looks like you are trying to use a shared connection. There is a bug in oneiric regarding this. Please look at a different answer for a workaround and the link to the bug. Wired Connection shared with other computers connects then disconnects in the nm-applet The workaround is to set IPv6 to ignore when you edit the connection and then do sudo killall dnsmasq
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Author by
yuttadhammo
Updated on September 18, 2022Comments
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yuttadhammo almost 2 years
Just trying to get my ethernet connection to work in Oneiric, and when I plug the cable in it connects and disconnects forever. /var/syslog says this (repeats it over and over again):
Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) successful, device activated. Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) Stage 5 of 5 (IP Configure Commit) complete. Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) Stage 4 of 5 (IP4 Configure Get) complete. Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <warn> dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2) Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> (eth0): device state change: activated -> failed (reason 'sharing-start-failed') [100 120 18] Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <warn> Activation (eth0) failed. Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> (eth0): device state change: failed -> disconnected (reason 'none') [120 30 0] Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> (eth0): deactivating device (reason 'none') [0] Sep 26 17:06:47 X58A-UD3R avahi-daemon[1321]: Withdrawing address record for 10.42.43.1 on eth0. Sep 26 17:06:47 X58A-UD3R avahi-daemon[1321]: Leaving mDNS multicast group on interface eth0.IPv4 with address 10.42.43.1. Sep 26 17:06:47 X58A-UD3R avahi-daemon[1321]: Interface eth0.IPv4 no longer relevant for mDNS. Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> Clearing nscd hosts cache. Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table nat --delete POSTROUTING --source 10.42.43.0/255.255.255.0 ! --destination 10.42.43.0/255.255.255.0 --jump MASQUERADE Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --delete FORWARD --destination 10.42.43.0/255.255.255.0 --out-interface eth0 --match state --state ESTABLISHED,RELATED --jump ACCEPT Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --delete FORWARD --source 10.42.43.0/255.255.255.0 --in-interface eth0 --jump ACCEPT Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --delete FORWARD --in-interface eth0 --out-interface eth0 --jump ACCEPT Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --delete FORWARD --out-interface eth0 --jump REJECT Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --delete FORWARD --in-interface eth0 --jump REJECT Sep 26 17:06:47 X58A-UD3R ntpdate[15004]: Can't find host ntp.ubuntu.com: Name or service not known (-2) Sep 26 17:06:47 X58A-UD3R ntpdate[15004]: no servers can be used, exiting Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --delete INPUT --in-interface eth0 --protocol udp --destination-port 67 --jump ACCEPT Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --delete INPUT --in-interface eth0 --protocol tcp --destination-port 67 --jump ACCEPT Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --delete INPUT --in-interface eth0 --protocol udp --destination-port 53 --jump ACCEPT Sep 26 17:06:47 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --delete INPUT --in-interface eth0 --protocol tcp --destination-port 53 --jump ACCEPT Sep 26 17:06:47 X58A-UD3R avahi-daemon[1321]: Joining mDNS multicast group on interface eth0.IPv6 with address fe80::a800:4ff:fe00:a04. Sep 26 17:06:47 X58A-UD3R avahi-daemon[1321]: New relevant interface eth0.IPv6 for mDNS. Sep 26 17:06:47 X58A-UD3R avahi-daemon[1321]: Registering new address record for fe80::a800:4ff:fe00:a04 on eth0.*. Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Auto-activating connection 'Wired'. Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) starting connection 'Wired' Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> (eth0): device state change: disconnected -> prepare (reason 'none') [30 40 0] Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) scheduled... Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) started... Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) scheduled... Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) complete. Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) starting... Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> (eth0): device state change: prepare -> config (reason 'none') [40 50 0] Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) successful. Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) scheduled. Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) complete. Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) started... Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> (eth0): device state change: config -> ip-config (reason 'none') [50 70 0] Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) Stage 4 of 5 (IP4 Configure Get) scheduled... Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) Beginning IP6 addrconf. Sep 26 17:06:50 X58A-UD3R avahi-daemon[1321]: Withdrawing address record for fe80::a800:4ff:fe00:a04 on eth0. Sep 26 17:06:50 X58A-UD3R avahi-daemon[1321]: Leaving mDNS multicast group on interface eth0.IPv6 with address fe80::a800:4ff:fe00:a04. Sep 26 17:06:50 X58A-UD3R avahi-daemon[1321]: Interface eth0.IPv6 no longer relevant for mDNS. Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) complete. Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) Stage 4 of 5 (IP4 Configure Get) started... Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Activation (eth0) Stage 5 of 5 (IP Configure Commit) started... Sep 26 17:06:50 X58A-UD3R avahi-daemon[1321]: Joining mDNS multicast group on interface eth0.IPv4 with address 10.42.43.1. Sep 26 17:06:50 X58A-UD3R avahi-daemon[1321]: New relevant interface eth0.IPv4 for mDNS. Sep 26 17:06:50 X58A-UD3R avahi-daemon[1321]: Registering new address record for 10.42.43.1 on eth0.IPv4. Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> caught signal 15, shutting down normally. Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Clearing nscd hosts cache. Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --insert INPUT --in-interface eth0 --protocol tcp --destination-port 53 --jump ACCEPT Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --insert INPUT --in-interface eth0 --protocol udp --destination-port 53 --jump ACCEPT Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --insert INPUT --in-interface eth0 --protocol tcp --destination-port 67 --jump ACCEPT Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --insert INPUT --in-interface eth0 --protocol udp --destination-port 67 --jump ACCEPT Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --insert FORWARD --in-interface eth0 --jump REJECT Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --insert FORWARD --out-interface eth0 --jump REJECT Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --insert FORWARD --in-interface eth0 --out-interface eth0 --jump ACCEPT Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --insert FORWARD --source 10.42.43.0/255.255.255.0 --in-interface eth0 --jump ACCEPT Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table filter --insert FORWARD --destination 10.42.43.0/255.255.255.0 --out-interface eth0 --match state --state ESTABLISHED,RELATED --jump ACCEPT Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Executing: /sbin/iptables --table nat --insert POSTROUTING --source 10.42.43.0/255.255.255.0 ! --destination 10.42.43.0/255.255.255.0 --jump MASQUERADE Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> Starting dnsmasq... Sep 26 17:06:50 X58A-UD3R NetworkManager[1344]: <info> (eth0): device state change: ip-config -> activated (reason 'none') [70 100 0] Sep 26 17:06:50 X58A-UD3R dnsmasq[15064]: failed to create listening socket for 10.42.43.1: Address already in use Sep 26 17:06:50 X58A-UD3R dnsmasq[15064]: FAILED to start up -
Admin about 12 yearsI did this too. But not resolved here: askubuntu.com/questions/148055/… -
Admin about 12 yearsIt did not helped in my case here: askubuntu.com/questions/148055/…
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Eliah Kagan over 11 yearsThis answer would be even better, if you could add a screenshot.
